Story 45465105,45465475: [WIP] changed workflow of PBC page such that + button above responses list creates new response immediately and defers relating to a system.
system selector update

Signed-off-by: Predrag Kanazir <predrag@arraystudio.com>
Story 45465105,45465475 documents now create or select on ENTER when typing in Evidence field. Also remove reference has been replaced by edit document dialog in responses and systems.
Merge remote-tracking branch 'github/pbc-refinement' into develop

Conflicts:
	app/views/pbc_lists/_requests.haml